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  2. Ron Larson - Wikipedia

    en.wikipedia.org/wiki/Ron_Larson

    Roland "Ron" Edwin Larson (born October 31, 1941) is a professor of mathematics at Penn State Erie, The Behrend College, Pennsylvania. [1] He is best known for being the author of a series of widely used mathematics textbooks ranging from middle school through the second year of college.

  3. Algebra tile - Wikipedia

    en.wikipedia.org/wiki/Algebra_tile

    An example of multiplying binomials is (2x+1)×(x+2) and the first step the student would take is set up two positive x tiles and one positive unit tile to represent the length of a rectangle and then one would take one positive x tile and two positive unit tiles to represent the width. These two lines of tiles would create a space that looks ...

  4. Mass point geometry - Wikipedia

    en.wikipedia.org/wiki/Mass_point_geometry

    All problems that can be solved using mass point geometry can also be solved using either similar triangles, vectors, or area ratios, [2] but many students prefer to use mass points. Though modern mass point geometry was developed in the 1960s by New York high school students, [ 3 ] the concept has been found to have been used as early as 1827 ...

  5. Houghton Mifflin Harcourt - Wikipedia

    en.wikipedia.org/wiki/Houghton_Mifflin_Harcourt

    Under (new from 1991) president Nader F. Darehshori Houghton Mifflin acquired McDougal Littell in 1994, for $138 million, an educational publisher of secondary school materials, [26] and the following year acquired D.C. Heath and Company, [27] a publisher of supplemental educational resources.

  6. Holt McDougal - Wikipedia

    en.wikipedia.org/wiki/Holt_McDougal

    Holt McDougal is an American publishing company, a division of Houghton Mifflin Harcourt, that specializes in textbooks for use in high schools.. The Holt name is derived from that of U.S. publisher Henry Holt (1840–1926), co-founder of the earliest ancestor business, but Holt McDougal is distinct from contemporary Henry Holt and Company, which claims the history from 1866.

  7. Pre-algebra - Wikipedia

    en.wikipedia.org/wiki/Pre-algebra

    Pre-algebra is a common name for a course taught in middle school mathematics in the United States, usually taught in the 6th, 7th, 8th, or 9th grade. [1] The main objective of it is to prepare students for the study of algebra. Usually, Algebra I is taught in the 8th or 9th grade. [2]

  8. Mathcounts - Wikipedia

    en.wikipedia.org/wiki/Mathcounts

    The Mathcounts Competition Series spread quickly in middle schools, and today it is the best-known middle school mathematics competition. [5] In 2007, Mathcounts launched the National Math Club as a noncompetitive alternative to the Competition Series. In 2011, Mathcounts launched the Math Video Challenge Program, which was discontinued in 2023 ...

  9. Investigations in Numbers, Data, and Space - Wikipedia

    en.wikipedia.org/wiki/Investigations_in_Numbers...

    Investigations was developed between 1990 and 1998. It was just one of a number of reform mathematics curricula initially funded by a National Science Foundation grant. The goals of the project raised opposition to the curriculum from critics (both parents and mathematics teachers) who objected to the emphasis on conceptual learning instead of instruction in more recognized specific methods ...